package com.ithehema;
public class Test3 {
    public static void main(String[] args) {
        String Phone_number = "15572193955";
        //1.截取3位
        String start = Phone_number.substring(0, 3);
        //2.截取后4位
        String end = Phone_number.substring(7);
        //3.拼接
        String ret=start+"****"+end;
        //4.打印
        System.out.println(ret);
    }
}
